Profile: Water & Environmental Systems Est. specializes in water treatment solutions. We manufacture commercial, industrial and large residential reverse osmosis units. We also have an environmental division for sewage water treatment, capable of performing projects of different sizes. The enviro-star reactor sewage purification unit consists of a compact design bio sorption reactor, with a moving bed of biomass carries, and a clarifier. Sewage treatment plant, by contact aeration activated sludge compact reactor system, consists of a stabilization tank, reactor, clarifier, tertiary treatment and plant room.